Surgical pump



(No Model.)

0. H. TRUAX.

SURGICAL PUMP.

No. 459,054. Patented Sept. 8, 1891.

UNITED STATES PATENT OFFICE.

CHARLES H. TRUAX, OF CHICAGO, ILLINOIS.

SURGICAL PUMP.

SPECIFICATION forming part of Letters Patent No. 459,054., datedSeptember 8, 1891 Application filed March 7, 1891. Qerial No. 384,106.(No model.)

To all whom, it may concern.-

Be it known that I, CHARLES H. TRUAX, a citizen of the United States,residing at Chicage, Illinois, have invented certain new and usefulImprovements in Surgical Pumps, of which the following is aspecification.

My invention relates to that class of surgical pumps in which a flexibletube having a portion of its body located within a cylindrical casingand its ends projected through apertures therein is caused to deliver aliquid by the application of pressure thereto from a traveling rollerorrollers having a sliding connection with an arbor journaled transverselyof the casing and having outside thereof an operating-handle; and theobject of my invention is to provide simple and effective means forvarying the extent of the thrust of the pressure device and forlockingit in its adjusted position.

I11 the accompanying drawings, which show the preferred construction,Figure 1 is a side elevation of the pump with its attachingbracket fixedin position for use, some of the parts being broken away. Fig. 2 is asimilar View showing one wall of the casing removed to exposetheinterior construction. Fig. 3 is a transverse sectional elevationthrough the casing of the pump, and Fig. 4c is a horizontal sectionalplan view. Fig. 5 shows my invention applied to a pump having a singleroller.

The pump may be affixed to a support, as A, by means of the bracket 13,the pump proper having a cylindrical casing, the side walls whereof aremarked C, and these side walls may be apertured or imperforate, asdesired. The peripheral wall D of the pump is preferably apertured attwo separated points, as d d, which fall on the same side of a planepassing through the center of the pump. Through these apertures ispassed a flexible tube E, the body of which inside the casing restsagainst the peripheral wall. It is to be observed that this tube passesa little more than half-Way round the casing. Centrally of the casing isjournaled an arbor F, which is rotated by the handle H, which may bejointed, as shown. The ends of the arbor are longitudinally perforatedfor the passage of an adjusting-screw I, to the threads of which isadapted a traveling nut J, and the arbor has an offset portion 1, fromwhich project plates K, having flanges k thereon forming ways for theradially-sliding arms L of yokes M, which rotatably support the rollersN. The nut is pivotally connected with the yoke-arm by means of thelinkO,and the end of the screw I opposite the handle H has a thumb-piece o'thereon. 3y turning this thumb-piece it is evident that the travelingnut J may be caused to move laterally and through the links describedimpart a sliding movement to the roller-carrying yokes, and that by thissimple mechanism a delicate, certain, and rapid adjustment maybe givento the rollers in either direction.

The operation will be fully understood by reference to the severalfigures of the drawings.

In Fig. the roller is shown thrust outinto operative engagement with thetube, and the like position is indicated in Fig. 4, in which figure thenormal or inoperative position is indicated by dotted lines.

In use the tube will be constantly engaged by at least one of therollers, owing to the fact of the passage of the tube around more thanonehalf of the circumference of the casing.

The adjusting mechanism is readily applied to a pump having a singleroller, as shown in Fig. 5. In this instance one of the plates K isomitted and the nut may carry one or more links connected with thesliding yoke ar1n of the single roller.

The adjusting means above described are exceedingly simple in theirconstruction and effective in their operation, being positively actingin both directions,aud a sufficient degree of adjustment is provided forto render the pump operative with tubes of different sizes. The keepersforming the ways for the radially-sliding yoke-arms may be cast inte'grally with the arbor or stamped from a plate soldered in the bottom ofthe yoke-shaped portion of the arbor, and instead of providing theoilset in the arbor its sides mayhave slots communicating with thelongitudinal aperture thereof, through which said slots the ends of theconnecting-links may pass for connection with the sliding nut.

Instead of employing a traveling nut, a slidingsleeve,to which theendsof thelinksare connected, may be used and any suitable means employedfor moving the sleeve on its support, or the rod J may be connecteddirectly to the ends of the links and have a threaded connection withthe side of the casing or with the thumb-piece exterior to the casing,so as to move the ends of the links and thereby adjust the rollers.

1. In a surgical pump having a cylindrical casing" and an elastic tubepassing through the casing, a rotatable arbor and a traveling pressuredevice having a sliding connection with the arbor, a threaded rodbearing a travcling nut, and a linkpivotally connected to the nut andoperating to positively adjust and hold the pressure device radially ineither direction with relation to its arbor, substantiallyas described.

2. In a surgical pump having a cylindrical casing and an elastic tubepassing through the casing, a'central rotatable arbor andpressure-rollers having a sliding connection with and adapted to bemoved in their orbit by the arbor, a threaded rod extending into theeasing parallel to the arbor and bearing a travcling nut thereon, andlinks pivotally connected to the nut and operating to positively adjustthe rollers radiallyin either direction with relation to the arbor,substantially as described.

I CHARLES H. TRUAX.

Witnesses: I

CHARLES C. LINTHIcUM, FREDERICK O. GOODWIN.

